First revealed at E3, Super Mario Galaxy 2 is said to have 90 percent new levels with the rest being levels from the original Mario Galaxy with different objectives. Shigeru Miyamoto said at the time that the original plan was to "essentially create new variations of the worlds in Super Mario Galaxy." But, over time, the developers have had so many ideas that most of those originals were cut.

Stay tuned for more news coming out of the summit as we continue to report live from San Francisco and of course check back later today for our hands-on impressions.